85 lines
2.0 KiB
Factor
85 lines
2.0 KiB
Factor
! Copyright (C) 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: gadgets
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USING: generic hashtables kernel lists math matrices namespaces
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sequences styles vectors ;
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SYMBOL: origin
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global [ { 0 0 0 } origin set ] bind
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TUPLE: rect loc dim ;
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M: vector rect-loc ;
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M: vector rect-dim drop { 0 0 0 } ;
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: rect-bounds ( rect -- loc dim ) dup rect-loc swap rect-dim ;
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: rect-extent ( rect -- loc dim ) rect-bounds over v+ ;
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: >absolute ( rect -- rect )
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rect-bounds >r origin get v+ r> <rect> ;
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: intersect ( rect rect -- rect )
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>r rect-extent r> rect-extent swapd vmin >r vmax dup r>
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swap v- { 0 0 0 } vmax <rect> ;
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: intersects? ( rect/point rect -- ? )
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>r rect-extent r> rect-extent swapd vmin >r vmax r> v-
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[ 0 <= ] all? ;
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! A gadget is a rectangle, a paint, a mapping of gestures to
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! actions, and a reference to the gadget's parent.
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TUPLE: gadget
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paint gestures visible? relayout? root?
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parent children ;
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: gadget-child gadget-children first ;
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C: gadget ( -- gadget )
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{ 0 0 0 } dup <rect> over set-delegate
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t over set-gadget-visible? ;
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DEFER: add-invalid
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: invalidate ( gadget -- )
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t swap set-gadget-relayout? ;
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: relayout ( gadget -- )
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#! Relayout and redraw a gadget and its parent before the
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#! next iteration of the event loop.
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dup gadget-relayout? [
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drop
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] [
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dup invalidate
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dup gadget-root?
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[ add-invalid ]
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[ gadget-parent [ relayout ] when* ] ifte
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] ifte ;
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: (relayout-down)
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dup invalidate gadget-children [ (relayout-down) ] each ;
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: relayout-down ( gadget -- )
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#! Relayout a gadget and its children.
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dup add-invalid (relayout-down) ;
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: set-gadget-dim ( dim gadget -- )
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2dup rect-dim =
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[ 2drop ] [ [ set-rect-dim ] keep relayout-down ] ifte ;
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GENERIC: pref-dim ( gadget -- dim )
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M: gadget pref-dim rect-dim ;
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GENERIC: layout* ( gadget -- )
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: prefer ( gadget -- ) dup pref-dim swap set-gadget-dim ;
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M: gadget layout* drop ;
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GENERIC: user-input* ( ch gadget -- ? )
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M: gadget user-input* 2drop t ;
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